Need help for 15 points!

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

What are the exclude value of mn+3m

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.